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I guarantee you that Microsoft has not lost money on Teams at the same growth rate. Why does Slack get a pass for that?

How about Atlassian? Did they lose money for years?

Atlassian actually had decent numbers and was profitable when they went public. Source: https://techcrunch.com/2015/12/10/hipchat-maker-atlassian-be...

But they are abandoning hipchat

How are you able to guarantee that?